Fluidized-bed boiler monitoring system based on PLC and configuration software

Abstract

The invention discloses a fluidized-bed boiler monitoring system based on PLC and configuration software. The fluidized-bed boiler monitoring system based on PLC and configuration software adopts PLCas a hardware platform, realizes PID control through a ladder diagram, and selects the configuration software to complete design of a man-machine interface, so that the design of the fluidized-bed boiler monitoring system based on the PLC and configuration software is realized. The test run indicates that the fluidized-bed boiler monitoring system based on PLC and configuration software can meet design requirements, the purpose of automatically monitoring and controlling key parameters in the production process of a fluidized-bed boiler can be achieved; the key parameters of the fluidized-bedboiler can be monitored in a visualization interface based on the PLC and the configuration software; the parameters in the fluidized-bed boiler control system can be conveniently revised in a PC; andrelevant monitoring and control can be completed according to fluidized-bed boiler control requirements. The test run indicates that the fluidized-bed boiler monitoring system based on PLC and configuration software can meet the design requirements; the purpose of automatically monitoring and controlling key parameters in the production process of a fluidized-bed boiler can be achieved; the parameters can be stably achieved; the energy consumption of the fluidized-bed boiler is reduced, the control effect is good, and production requirements of coal slack electricity generation can be met.

Description

technical field [0001] The invention belongs to the field of programmable controllers, in particular to a fluidized boiler monitoring system based on PLC and configuration software. Background technique [0002] The boiling boiler is one of the most common thermal equipment in coal gangue power plants. Its function is to convert the carbon chemical energy in coal gangue into heat energy through combustion, and output it to the steam turbine in the form of steam. Coal gangue belongs to waste recycling. Therefore, the fluidized boiler is an energy-saving boiler. At present, most of the fluidized boilers in China are manually controlled or a simple DDZ instrument single-loop adjustment system, which consumes a lot of energy and the control effect is not ideal. [0003] figure 1 It is the basic structure of the existing fluidized boiler, and the basic structure of the fluidized boiler is composed of four parts: the body of the fluidized boiler, auxiliary equipment, safety devic...

AI Technical Summary

Problems solved by technology

Before the transformation, the No. 5 boiling boiler of the coal gangue power plant adopted a simple DDZ instrument single-loop adjustment manual control system. The temperature of the No. 5 boiling boiler often had poor furnace temperature control, which caused the boiling boiler to stall or coke, and the furnace pressure often appeared Positive pressure, steam The temperature control cannot be stabilized at 450°C, the steam pressure control cannot be stabilized at 3.82MPa, the water level control of the upper steam drum is unstable and fluctuates, and the speed control of the induced draft fan, blower, upper water pump, and coal feeder is not good, resulting in reliable operation of the boiling boiler Relatively low, affecting coal gangue power generation production

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